Update rollup to the latest version 🚀

[greenkeeper[bot]]

The devDependency rollup was updated from 0.66.6 to 0.67.0.

This version is not covered by your current version range.

If you don’t accept this pull request, your project will work just like it did before. However, you might be missing out on a bunch of new features, fixes and/or performance improvements from the dependency update.

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Find out more about this release.

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There is a collection of [frequently asked questions](https://greenkeeper.io/faq.html). If those don’t help, you can always [ask the humans behind Greenkeeper](https://github.com/greenkeeperio/greenkeeper/issues/new).

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Your Greenkeeper bot :palm_tree:

[codecov[bot]]

Codecov Report

Merging #9 into master will not change coverage. The diff coverage is n/a.

@@          Coverage Diff           @@
##           master      #9   +/-   ##
======================================
  Coverage    93.1%   93.1%           
======================================
  Files           1       1           
  Lines          29      29           
  Branches        2       2           
======================================
  Hits           27      27           
  Misses          2       2

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[greenkeeper[bot]]

• The devDependency rollup was updated from 0.66.6 to 0.67.1.

Update to this version instead 🚀

[greenkeeper[bot]]

• The devDependency rollup was updated from 0.66.6 to 0.67.2.

Update to this version instead 🚀

Commits

The new version differs by 3 commits.

• fe92d1f 0.67.2
• ed22964 Update changelog
• dbd2e47 Fix crash when returning undefined sourcemaps from renderChunk hook (#2558)

See the full diff

[greenkeeper[bot]]

• The devDependency rollup was updated from 0.66.6 to 0.67.3.

Update to this version instead 🚀

Commits

The new version differs by 4 commits.

• d9a7d65 0.67.3
• 4be8888 Update changelog
• bbdf8b3 Add more files to npm distribution (#2552)
• 084354e fix: experimentalPreserveModules not supported in inlineDynamicImports message (#2560)

See the full diff